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I haven't seen a monopod without a strap, so I'm going to assume it is a universal feature. The mount the strap is attached to can be used with the clip below to attach the collapsed monopod to your belt. The clip measures about 1/2 inch wide by 3 inches long.
My self supporting monopod with head weighs 2 pound 12 ounces. With the clip attached to my belt the monopod hangs straight down my leg. I can use the hook by leaving the clip on my belt when taking the monopod off or take the monopod with clip off my belt. In a pinch, you can clip it to your pants pocket instead, although I've only tried this on a pair of jeans.
I find leaving the clip on my belt works better for me as it is a one handed operation to get the monopod on and off the hook, but two a two handed operation to get the clip and monopod on my belt. I use my thumb to pull the strap up and out of the way and then use the thumb to guide the strap mount on to the hook. After a little practice, I could do this without looking.
$2.00 + shipping for three clips. Shipping was $2.50 for me.
ebay.com
Thank you
Russell